US Bridges

FAU 4920 (12 St.) over I-35 under

Fair

Carter County, Oklahoma · 1.0 MI N JCT US70 · Structure no. 224000000000000

Built
1989
36 years old
Condition
Fair
inspected January 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
295 ft
2 main spans
Daily traffic
200
2022 count
Owner
State
State Highway Agency

About this bridge

FAU 4920 (12 St.) over I-35 under is a steel continuous stringer/multi-beam or girder carrying FAU 4920 (12 St.) over I-35 under in Carter County, Oklahoma. It was built in 1989, so it is 36 years old, younger than the Oklahoma average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 200 vehicles a day, roughly 5% of them trucks, projected to reach 320 by 2042. The structure is 295 ft (89.9 m) long and 73 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesFAU 4920 (12 St.)
CrossesI-35 under
Location1.0 MI N JCT US70
RouteCity Street 4920
CountyCarter County
StateOklahoma
Coordinates34.18757, -97.16677
Functional classUrban Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56 US tons
Inventory rating33.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length295 ft (89.9 m)
Longest span154 ft (46.9 m)
Deck width73 ft (22.3 m)
Roadway width70 ft (21.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2022)
Projected traffic320 by 2042
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$6.3 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was FAU 4920 (12 St.) over I-35 under built?

It was built in 1989, making it 36 years old in 2025.

What condition is FAU 4920 (12 St.) over I-35 under in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in January 2023.

How much traffic does FAU 4920 (12 St.) over I-35 under carry?

About 200 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is FAU 4920 (12 St.) over I-35 under?

The structure is 295 ft (89.9 m) long with a longest span of 154 ft (46.9 m) and a deck 73 ft wide.

Who owns FAU 4920 (12 St.) over I-35 under?

It is owned by the State Highway Agency.